Modulating Steam Humidistat used with Model 866


The Model 5558 automatic digital modulating control package is the recommended humidistat for the Aprilaire modulating steam humidifier.

• Selectable Celsius or Fahrenheit scale. 
• Outputs controlling humidification and dehumidification. 
• Integrated sensor for better application flexibility. 
• Multi-level lockable access menu and lockable set point to prevent accidental changes.

0.7 lbs.
8.9L x 5.2W x 3.4H

Can I use a carbon filter and fan setup to also air-cool my grow lights?

This is not recommended due to the fact that grow room temperatures will rise if the carbon filter needs to turn off for instances such as CO2 enhancement. Use separate fans to air-cool grow lights and operate carbon filters.